Grub-Customizer is a useful tool to modify and fix your Grub entry. When we install Linux alongside Windows or other OS, we can easily modify GRUB2 entries, reinstall boot loader and many more. This tutorial will show you how to install Grub-Customizer on ChaletOS 14.04.3. The latest available version of Grub when this post is written is version 4.0.6.